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Probability

Probability Problem

A box contains glass lenses used for traffic signals. Six are red, four are yellow, and seven are green. If two are chosen at random find the probability they are both green, if: a. the first lense is replaced before the second is chosen b. the first lense is not replaced before the second is chosen.

Probabilty

Make a probability distribution chart using reduced fractions to show the following information: The chart below shows the number of committee members who attended a meeting. # of members - 2-3-4-5-6 # of committees-3-9-8-4-6

Probability

A. If two events are dependent, then P(A/B) will equal _______________. b. If two events are independent, then P(A and B) will equal _______________. c. The rule for complementary events is useful for finding P(_______________). d. If two events are not mutually exclusive, P(neither A nor B) will equal

Busy Tellers - National Bank

I got confussed with this one. So if you can help me out. Thank You Busy Tellers. Prescott National Bank has six tellers available to serve customers. The number of tellers busy with customers at, say, 1:00 P.M. varies from daya to day and depends on chance, so it is a random variable, say, X. Past records indicate that the p

Problem demonstrating conditional probability

A math teacher gave her class two tests. 25% of the class passed both tests, and 42% of the class passed the first test. What percent of those that passed the first test also passed the second test?

Proability

Data ib west coast moviegoers in 2002 showed that 72.4% were male, 58.3% were under 25 years of age and 42.1% were males under 25 years of age. Let M=the event that the person is male and let A=the event that the person is under 25 years of age. Suggested to use a Venn Diagram. A. What is the probability that the person is

Probabilities

On the Titanic, the passenger roster showed that there were 1692 men, 422 women, 64 boys, and 45 girls. Only 332 men and 29 boys survived. 104 women and 18 girls died. Answer in reduced fraction form. A. What is the probability of selecting a person from the roster who was a man who survived? B. What is the probability of s

Probability

If 10% of the people who take a certain drug develop at least one of the side effects. Find the probability that in a sample of 20 people who take the drug: A. at most one will suffer side effects b. Exactly four will suffer side effects c. at least one will suffer side effects d. all 20 will suffer side effects Please

Statistical Probablilities

43% of adults report if the election were to take place today, they would vote for Kerry. A. If 1 adult is chosen at roandom, what is the probability the adult will NOT vote for Kerry? B. If 2 adults are chosen at random, what is the probability that BOTH will NOT vote for Kerry? C. If two adults are chosen at random, wha

Psychology Statistics 240

The average IQ is 100. What percentage of people have IQs between 80 and 120. (IQ is normally distributed with mean 100, SD=15)

Probability

Over a long period of time, it has been determined that 70% of Lawyers who take the bar examination pass the examination. Of 500 lawyers who take the examination next, find the probability that 330 or fewer will (Question also contained in attachment)

Probability hypothesis

Statistics >Probability What is the probability of rolling the number 4 (on one die) and the number 3 (on the other die) with a normal pair of dice if you roll the dice 100 times? Statistics > Hypothesis Testing In 1980, the Gallup poll asked Americans whether current safety regulations made nuclear power plants safe enou

Single-event probability, dice

Can you help me understand how to solve this problem? (I need the process and math behind it, not just the answer). Suppose I have a 10-sided die. It's clear enough that the odds of rolling a 1 are 10% for any single roll. What, then, is the likelihood that I will roll a 1 given 10 rolls? Given 5 or 20 rolls? I'd need to sol

Business Stats there is a data file attached.

1. For the eight compentecies listed above, what are the means and standard deviations? What two compentencies have the highest means? What two compentencies have the highest standard deviations? Are these what you would expect from vieving the probabilities presented in this table? 2. If 10 business shcools were selected

Probability of dice, coin flips, and deck of cards.

1. A die is tossed 7 times, find the chance that (a) all rolls show 2 or less (b) none of the rolls show 2 or less (c) not all show 2 or less 2. A coin is tossed 4 times, find the chance that (a) all rolls are Heads (b) the 1st two tosses are Head and last two are Tails (c) the 4th is a Head, given the 1st 3 are

Business Statitsics Problem

A company has a turnover of 10% of their hourly employees annually. Thus for any hourly employee chosen at random management estimates a probability of .1 that the person will not be with the company next year. Choosing three hourly employees at randome use a Tree Diagram and show what is the probability that (1) of them wi

Probabilities

Please see the attached file for full problem description. --- Suppose that and are independent events such that and . Find the following probabilities: P ( A upside down U B) = P (A U B ) =

disposal of capacitors with polychlorinated biphenyl (PCB)

Polychlorinated biphenyl (PCB) is among a group of organic pollutants found in a variety of products, such as coolants, insulating materials, and lubricants in electrical equipment. Disposal of items containing less than parts per million (ppm) PCB is generally not regulated. A certain kind of small capacitor contains PCB with

Probability Calculations and Unemployement

Please help with the following problems. Provide step by step calculations. A recently published study shows that a country's true unemployment rate to be 12%. Assume that 300 members of the labour force are selected at random. A) What is the expected number of people unemployed? B) What is the probability that exactly 29

Probability:

The "at most" and "at least" topic confuses me Could you briefly describe both and post a small example to help explain each? Thanks

Binomial Probability Distribution

The Complaints Department of a popular used car dealer receives most complaints about the electrical system, particularly the starter. The department sent questionnaires to 300 owners of two-year-old, used, full-sized vehicles. The survey showed 15% of the owners had trouble with the starter. Based on the result of the survey, w

Binomial Probability Distribution Problems

Please help with the following problems. The manager of the local Tim Horton's found that 60% of her employees call in sick on Fridays before the long weekend. Out of a sample of ten employees, what is the probability that: A) exactly three employees will call in sick B) not more than one employee will call in sick. C)

Probability Calculations- Probability distribution, Expected value

Please help with the following problems. Harvard University published the age profile of it's first time students. A random sample of 33 students has ten students in their thirties, fifteen students in their forties, five students in their fifties, and three students in their sixties. A student is selected randomly from the

Statistics

J&G Painting has hired you as a consultant. You have been gathering data on its painting speed in an effort to help the company be more accurate in submitting bids. Based on data gathered after considering washing, taping, painting, and clean up, one person can paint an average of 100 square feet of indoor wall space per hour (b

Combination probability

A bridge hand consists of 13 cards dealt at random from an ordinary deck of 52 playing cards. a)How many possible bridge hands are there? b) Find the probability of being dealt a bridge hand that contains exactly two of four aces. c) Find the probability of being dealt an 8-4-1 distribution, that is, eight cards of one suit,

Probability questions- Independent events

Jill wants to do her MBA in Statistics at a B.C. university. She applies to two universities that offer post-graduate degrees in Statistics. Assume that the acceptance rate at University A is 25% and at University B is 35%. Further assume that acceptance at the two universities are independant events. A) What is the probability